Writing instrument



FIG. 1 is a perspective view of a writing instrument, in accordance with the present invention.

FIG. 2 is a second perspective view of a writing instrument shown in FIG. 1.

FIG. 3 is a top view of a writing instrument shown in FIG. 1.

FIG. 4 is a bottom view of the writing instrument shown in FIG. 1; and,

FIG. 5 is a side view of the writing instrument shown in FIG. 1. 

The ornamental design for a writing instrument, as shown and described. 